Compilare: user.cpp: In function ‘void df(int)’: user.cpp:36:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[i].size();j++) ^ user.cpp: In function ‘void sterge(int, int)’: user.cpp:46:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[x].size();j++) ^ user.cpp: In function ‘void euler(int)’: user.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[i].size();j++) ^ user.cpp:61:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[i].size();j++) ^ user.cpp: In function ‘void citire()’: user.cpp:13:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:16:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^